See: https://www.virustotal.com/nl/url/9036baaaa3240986b1054980086de9cec40a79f7a4dac7ff43f21e7b709df62b/analysis/1426005551/
See: ISSUE DETECTED DEFINITION INFECTED URL
Website Malware php-error-fatal-error?v6 htxp://posters-a-z.com/404javascript.js
IP badness history: https://www.virustotal.com/nl/ip-address/184.154.195.2/information/
Script - http://www.matchagainst.com/search?query=AdRotate
Consider: http://www.sophos.com/en-us/threat-center/threat-analyses/adware-and-puas/AdRotate/detailed-analysis.aspx
Bug here: https://wordpress.org/support/topic/bug-with-dyngroups
polonus